1. allyl radical

noun. The univalent unsaturated organic radical C3H5; derived from propylene.
Synonyms
allyl group allyl group chemical group radical
Antonyms
moderate old incidental cauline

2. radical

adjective. (ˈrædɪkəl) (used of opinions and actions) far beyond the norm.
Synonyms
ultra extremist immoderate
Antonyms
moderate natural object fat person introvert
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

3. radical

noun. (ˈrædɪkəl) (chemistry) two or more atoms bound together as a single unit and forming part of a molecule.
Synonyms
propyl arsenic group azo group chromophore uranyl aldehyde radical allyl radical benzyl carboxyl methylene radical carboxyl group cacodyl radical benzoyl radical uranyl radical cacodyl alcohol group cyanide radical methylene group building block alcohol radical aldehyde group glyceryl allyl ketone group hydrazo radical propyl group hydrazo group cyanide group benzoyl group chemical group cacodyl group nitro group acyl group alkyl radical amino azido group butyl benzyl group cyano group amyl group hydroxyl methylene alkyl hydroxyl radical alkyl group uranyl group azido radical nitrite unit allyl group molecule carbonyl group vinyl radical vinyl group azo radical hydroxyl group propyl radical acyl benzyl radical vinyl cyano radical amino group
Antonyms
unemotional person resident granter extrovert liberator
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

4. radical

adjective. (ˈrædɪkəl) Markedly new or introducing radical change.
Synonyms
new revolutionary
Antonyms
old good guy acquaintance
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

5. radical

noun. (ˈrædɪkəl) An atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule.
Synonyms
atom free radical
Antonyms
drinker follower smoker
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

6. radical

adjective. (ˈrædɪkəl) Arising from or going to the root or source.
Synonyms
basic
Antonyms
incidental male
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

7. radical

noun. (ˈrædɪkəl) A person who has radical ideas or opinions.
Synonyms
terrorist syndicalist revolutionary Marxist someone bolshy extremist mortal red anarchist bolshie leveller somebody leveler person subversive Wobbly Trotskyist Bolshevik nihilist individual subverter Trotskyite young Turk soul Trot revolutionist
Antonyms
creditor partisan leader good person nonreligious person
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

8. radical

noun. (ˈrædɪkəl) (mathematics) a quantity expressed as the root of another quantity.
Synonyms
quantity measure amount
Antonyms
member stranger bad guy withholder
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

9. radical

adjective. (ˈrædɪkəl) Especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem.
Synonyms
basal
Antonyms
cauline artifact
Etymology
radical (English)
radical (French)
radicalis (Latin)
radix (Latin)
ῥάδιξ (Ancient Greek (to 1453))

10. allyl

noun. The univalent unsaturated organic radical C3H5; derived from propylene.
Synonyms
allyl group allyl radical group chemical group radical
Antonyms
moderate old incidental cauline
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